Two conductors are carrying forward and return current of +I and -I as shown in Fig. The magnetic field intensity \(\vec H\) at point P is
1
\(\frac{I}{{\pi d}}{\vec a_y}\)
2
\(\frac{I}{{\pi d}}{\vec a_x}\)
3
\(\frac{I}{{2\pi d}}{\vec a_y}\)
4
\(\frac{I}{{2\pi d}}{\vec a_x}\)